It's a little weird but I think its a trial ballon for having the local BOE print out the KMs from jw.org as opposed to printing and mailing them. They want to see if there are any problems and if the problems are minor (ask the COs to poll the local BOEs and report back) then they'll proceed with moving more things to this format.
Pure speculation because it's not as if 1) people don't know when a convention takes place and 2) those sessions are open to the public.
Also, it's not like they have so much stuff they want to put in that they don't have room!!